Answer:
a=-6
Step-by-step explanation:
2(a+5)=-2 Step 1 distribute
2a+10=-2 Step 2 minus 10 on both sides
2a=-12 Step 3 divide but 2 on both sides
a=-6
Answer:

Step-by-step explanation:
If two variables are the same when they are multiplied it becomes that variable squared.
8 x C x C
Answer:
I'm just going to assume inbetween 4 and 2 is a multiplication symbol. If it isn't, just comment under and I'll tell u the answer.
hope this is right :D
Put it in a 130ml beaker, get your ml value and subtract it by 130ml.